A site is bypassing the filtering rules by changing the "sender" of messages, I can't simply use the email address it comes from, but must put in each individual person supposedly sending me a message from that site (though in fact it's just that site reminding me there's a message I need to read on their website to see).
What I want to be able to do is use the email address from which it is coming, whichever sender it is given as, in order to filter it into some message notification folder, and not have it gum up my inbox. Could be regular expressions, could be an option to take any sender from that address, but it is otherwise very easy for people to bypass filtering rules.
The Mobile interface has become extremely slow, and more than that, being able to scroll and resize a desktop page as I choose is actually more comfortable than having to deal with the same constant sized confined interface.
Consider that people with a wide variety of needs are using your website, and may be using plugins and strategies that work best in desktop mode.
When entering an email, if I move away to check details of the thing I typed, and move back, outlook decides I must be finished and this malformed string is actually an address, worse, it won't let me highlight in order to copy out the address to start again. It's like some kind of puzzle challenge where you must complete a level correctly or go back to the start.